import nagios
import socket_protocol
# from devdi.topic import topic_by_props

DID_FOLLOWS_SETPOINT = 'follow_setpoint'
DID_BATTERY_LEVEL = 'battery'
DID_HEARTBEAT = 'heartbeat'


class server(socket_protocol.pure_json_protocol):
    def __init__(self, *args, **kwargs):
        if 'devices' in kwargs:
            self.__devices__ = kwargs.pop('devices')
        socket_protocol.pure_json_protocol.__init__(self, *args, **kwargs)
        #
        if not self.__comm_inst__.IS_CLIENT:
            self.register_callback(socket_protocol.SID_READ_REQUEST, DID_FOLLOWS_SETPOINT, self.device_status)
            self.register_callback(socket_protocol.SID_READ_REQUEST, DID_BATTERY_LEVEL, self.device_status)
            self.register_callback(socket_protocol.SID_READ_REQUEST, DID_HEARTBEAT, self.device_status)

    def device_status(self, msg):
        if msg.get_status() == socket_protocol.STATUS_OKAY:
            try:
                dev = self.__devices__.get_str(**msg.get_data())
            except:
                return socket_protocol.STATUS_CALLBACK_ERROR, {"status": nagios.Nagios.UNKNOWN, "msg": "Device does not exist."}
            if dev is None:
                return socket_protocol.STATUS_SERVICE_OR_DATA_UNKNOWN, {"status": nagios.Nagios.UNKNOWN, "msg": "Device does not exist."}
            else:
                return socket_protocol.STATUS_OKAY, dev.status(msg.get_data_id())
        else:
            return socket_protocol.STATUS_OPERATION_NOT_PERMITTED, {"status": nagios.Nagios.UNKNOWN, "msg": "Socket protocol error."}